Change macbook air to use a pre-dumped SPD.

MBA has a soldered RAM without SPD, so you need to use stored SPD.

Change-Id: I0205e6c65ccbfe7764c12c815e60801a3c3623a5
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/11841
Tested-by: build bot (Jenkins)
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/apple/macbookair4_2/Makefile.inc

@@ -1,3 +1,7 @@
 romstage-y += early_southbridge.c
 romstage-y += gpio.c
 ramstage-y += gnvs.c
+
+cbfs-files-y += spd.bin
+spd.bin-file := spd.bin
+spd.bin-type := spd

src/mainboard/apple/macbookair4_2/early_southbridge.c

@@ -15,6 +15,7 @@
 #include "southbridge/intel/bd82x6x/gpio.h"
 #include <arch/cpu.h>
 #include <cpu/x86/msr.h>
+#include <cbfs.h>
 
 void pch_enable_lpc(void)
 {
@@ -51,11 +52,15 @@ const struct southbridge_usb_port mainboard_usb_ports[] = {
 	{ 1, 0, -1 },
 };
 
-/* FIXME: Put proper SPD map here. */
 void mainboard_get_spd(spd_raw_data *spd)
 {
-	read_spd(&spd[0], 0x50);
-	read_spd(&spd[1], 0x51);
-	read_spd(&spd[2], 0x52);
-	read_spd(&spd[3], 0x53);
+	void *spd_file;
+	size_t spd_file_len = 0;
+	spd_file = cbfs_boot_map_with_leak("spd.bin", CBFS_TYPE_SPD,
+						&spd_file_len);
+	if (spd_file && spd_file_len >= 1024) {
+		int i;
+		for (i = 0; i < 4; i++)
+			memcpy(&spd[i], spd_file + 256 * i, 128);
+	}
 }